DR. REMYA NAIR

The discovery of gravitational waves (GWs) was one of the biggest scientific discoveries in recent times. A new era of GW astronomy has started and soon we will be able to determine properties like masses, spins, etc. of many GW sources. The GW community is now looking forward to the launch of the much-awaited space-based interferometric detectors like eLISA and DECIGO. The co-existence of the ground and space based telescopes may afford us considerable gain in the estimation of the source parameters. In this talk, the speaker will discuss potential gain in combining measurements of future ground and space-based detectors for estimating the parameters of a binary coalescence. Using the post-Newtonian waveform for the inspiral of non-spinning neutron star-black hole binaries in circular orbits, the speaker will show how the estimates for the chirp mass and the symmetric mass ratio are improved by combining the data from different space-ground detector pairs. Another key area of interest in the field is determining cosmological parameters using GW observations as standard sirens. A major hurdle here is that GW observations do not provide redshift information of the sources. She will discuss the efforts in an ongoing project aimed at circumventing this problem.